| 报告题目 | Optical Mass Spectrometry Based on Hybrid Nanomechanical Resonator Systems |
| 报告人 | Prof. Dr. Ka-Di Zhu |
| 报告人单位 | Shanghai JiaoTong University |
| 报告时间 | 2012-11-09 |
| 报告地点 | 合肥微尺度物质科学国家实验室9004会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告摘要：
With the small mass, large quality-factor, high frequency, nanomechanical resonators (NRs) will ultimately find usage in a broad range of applications, such as electrometry, optomechanical/ electromechanical signal processing, and mass detection. In this talk, we shall focus on a particular NR application: ultrasensitive mass spectrometry in all-optical domain. The convectional electrical mass detection is usually based on the electric environment, where nanomechanical resonator should be suspended between two electrodes above a conducting plate, while a voltage applies on them. However, the heating effect and the energy loss induced by the current through it during the measurement will lead to the imprecision of mass detection. Addressed to this problem, in this talk, we propose a more sensitive optical protocol to weigh the external particles deposited onto the surface of mechanical resonator, which is so far the first method to deal with the NR based mass spectrometry in all-optical domain. This optical mass spectrometry has the potential to break through the limitation of frequency restriction and to enhance the sensitivity of mass spectrometry. |
